Gas sensor

Abstract

A gas sensor 100 includes: a cylindrical metal shell 110 ; a gas detection element 120 ; a cylindrical sleeve 170 at least partially located inside the metal shell 110 , and an axial hole 170 c penetrating through the sleeve and accommodating the gas detection element 120 therein; and a connector 180 joined to a rear end portion of the gas detection element 120 and spaced apart from the sleeve 170 , the connector 180 including a plurality of connector terminal portions 182 to 186 electrically connected to corresponding electrode terminal portions 125 to 129.

1 . A gas sensor comprising: 
 a cylindrical metal shell;    a gas detection element including a solid electrolyte layer, a front end portion of the gas detection element projecting from a front end portion of the metal shell and including a gas detection portion, an intermediate portion located inside the metal shell, and a rear end portion projecting from a rear end portion of the metal shell and including a plurality of electrode terminal portions and a plurality of via conductors electrically connected to corresponding electrode terminal portions;    a cylindrical sleeve at least partially located inside the metal shell, and an axial hole penetrating through the sleeve and accommodating the gas detection element therein; and    a connector joined to the rear end portion of the gas detection element and spaced apart from the sleeve, the connector including a plurality of connector terminal portions electrically connected to corresponding electrode terminal portions.    
   
   
       2 . The gas sensor as claimed in  claim 1 , 
 wherein the sleeve further includes a projecting portion projecting from the rear end portion of the metal shell and supporting said gas sensor element.    
   
   
       3 . The gas sensor as claimed in  claim 1 , 
 wherein the sleeve further includes a large diameter portion having a larger diameter than that of the protruding portion and a shoulder portion facing the rear end in the axial direction, and    wherein the rear end portion of the metal shell is bent inwardly so as to crimp the shoulder portion.    
   
   
       4 . The gas sensor as claimed in  claim 2 , 
 wherein the sleeve further includes a large diameter portion having a larger diameter than that of the protruding portion and a shoulder portion facing the rear end in the axial direction, and    wherein the rear end portion of the metal shell is bent inwardly so as to crimp the shoulder portion.